The genotype of plants with the recessive phenotype of wrinkled seeds is always homozygous. However, when an individual plant expresses the dominant phenotype of round seeds, it can have either the genotype RR or Rr. How could you test whether the dominant individual is a true breeder (RR)?

genotypes and phenotypes in dominant and recessive ... Mendel's parental pea plants always bred true because both produced ... The recessive trait will only be expressed by offspring that have two copies of ... You do a test cross between a pea plant with wrinkled peas (genotype rr)

Explanation:

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